highlight error field

src/screens/Login/LoginForm.tsx

@@ -57,9 +57,11 @@ export const LoginForm = ({
   onAttemptFailed: () => void
 }) => {
   const t = useTheme()
-  const [isProcessing, setIsProcessing] = useState<boolean>(false)
-  const [isAuthFactorTokenNeeded, setIsAuthFactorTokenNeeded] =
-    useState<boolean>(false)
+  const [isProcessing, setIsProcessing] = useState(false)
+  const [errorField, setErrorField] = useState<
+    'none' | 'identifier' | 'password' | '2fa'
+  >('none')
+  const [isAuthFactorTokenNeeded, setIsAuthFactorTokenNeeded] = useState(false)
   const identifierValueRef = useRef<string>(initialHandle || '')
   const passwordValueRef = useRef<string>('')
   const [authFactorToken, setAuthFactorToken] = useState('')
@@ -80,17 +82,20 @@ export const LoginForm = ({
     if (isProcessing) return
     Keyboard.dismiss()
     setError('')
+    setErrorField('none')
 
     const identifier = identifierValueRef.current.toLowerCase().trim()
     const password = passwordValueRef.current
 
     if (!identifier) {
       setError(_(msg`Please enter your username`))
+      setErrorField('identifier')
       return
     }
 
     if (!password) {
       setError(_(msg`Please enter your password`))
+      setErrorField('password')
       return
     }
 
@@ -147,6 +152,7 @@ export const LoginForm = ({
             error: errMsg,
           })
           setError(_(msg`Invalid 2FA confirmation code.`))
+          setErrorField('2fa')
         } else if (
           errMsg.includes('Authentication Required') ||
           errMsg.includes('Invalid identifier or password')
@@ -187,7 +193,7 @@ export const LoginForm = ({
           <Trans>Account</Trans>
         </TextField.LabelText>
         <View style={[a.gap_sm]}>
-          <TextField.Root>
+          <TextField.Root isInvalid={errorField === 'identifier'}>
             <TextField.Icon icon={At} />
             <TextField.Input
               testID="loginUsernameInput"
@@ -202,6 +208,7 @@ export const LoginForm = ({
               defaultValue={initialHandle || ''}
               onChangeText={v => {
                 identifierValueRef.current = v
+                if (errorField) setErrorField('none')
               }}
               onSubmitEditing={() => {
                 passwordRef.current?.focus()
@@ -214,7 +221,7 @@ export const LoginForm = ({
             />
           </TextField.Root>
 
-          <TextField.Root>
+          <TextField.Root isInvalid={errorField === 'password'}>
             <TextField.Icon icon={Lock} />
             <TextField.Input
               testID="loginPasswordInput"
@@ -229,6 +236,7 @@ export const LoginForm = ({
               clearButtonMode="while-editing"
               onChangeText={v => {
                 passwordValueRef.current = v
+                if (errorField) setErrorField('none')
               }}
               onSubmitEditing={onPressNext}
               blurOnSubmit={false} // HACK: https://github.com/facebook/react-native/issues/21911#issuecomment-558343069 Keyboard blur behavior is now handled in onSubmitEditing
@@ -270,7 +278,7 @@ export const LoginForm = ({
           <TextField.LabelText>
             <Trans>2FA Confirmation</Trans>
           </TextField.LabelText>
-          <TextField.Root>
+          <TextField.Root isInvalid={errorField === '2fa'}>
             <TextField.Icon icon={Ticket} />
             <TextField.Input
               testID="loginAuthFactorTokenInput"
@@ -281,8 +289,11 @@ export const LoginForm = ({
               autoComplete="one-time-code"
               returnKeyType="done"
               blurOnSubmit={false} // prevents flickering due to onSubmitEditing going to next field
-              onChangeText={setAuthFactorToken}
               value={authFactorToken} // controlled input due to uncontrolled input not receiving pasted values properly
+              onChangeText={text => {
+                setAuthFactorToken(text)
+                if (errorField) setErrorField('none')
+              }}
               onSubmitEditing={onPressNext}
               editable={!isProcessing}
               accessibilityHint={_(